cpsrvd failed - nothing works

Since 7 hours ago i have received about 100 cpsrvd failed messages. I tried upcp update, restarting cpanel and nothing helps. The only thing I can do is SSH in and it's reallly slow. Just logging in takes 5minutes to see the root.
The ping reply is fine, but everything is really slow.
Any ideas on how i can get the server up and running again?
I have clients calling me left and right and it has been hours since any website was up.
Any suggestions or help would be greatly appreciated.

btw everything was fine until this morning and I didn't do any updates,upgrades nor changes.